Warp stop-motion for looms.



No. 638,567. Patented Dec. 5, I899. G. 0. DRAPER.

WARP STOP MOTION FOR LOUWIS.

(Application filed Aug. 7, 1899.)

(No Model.)

E icE.

PA TENT GEORGE O. DRAPER, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO THE DRAPER COMPANY, OF SAME PLACE AND PORTLAND, MAINE.

WARP STOP-MOTION FOR LOOMS.

SPECIFICATION formingpart of Letters Patent No. 638,567, dated December 5, 1899.

Application filed August 7, 1899. Serial No. 726,367. (No model.)

To all whont it may concern.-

Be it known that I, GEORGE O. DRAPER, of I-Iopedale, county of W'orcester, State of Massachusetts, have invented an Improvement in \Varp Stop-\Iotions for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representin g like parts.

IO This invention has for its object the production of simple and efficient warp stop-motion apparatus of the type wherein the movement of a detector into abnormal position when released by a broken or unduly-slack r5 warp-thread is made operative through engagement with a feeler to edect actuation of suitable stopping means for the apparatus.

In practicing my invention I use a'detector preferably made of thin flat sheet metal, having an. aperture near each end, either one receiving the warp-thread, while the other receives the fixed support on which the detector is pivotally mounted, so that the detector is reversible. A released detector assumes an upright position, with its upper end projecting above the plane of the warp-threads, indicating visually to the weaver the breakage or slackness of a thread and its location as well. This is eifected by making the holes or apertures such a distance from the ends of the detectors that the extension or part beyond the aperture will project above the warpthreads when the detector is in abnormal position.

5 The structure of the apparatus is very simple and open, as will appear hereinafter, so

that there is no chance for lint to gather in any quantity.

Figure 1 is a longitudinal sectional view of a portion of a loom with one embodiment of my invention applied thereto, taken on the line 10:0,Fig. 2. Fig. 2 is a partial rear elevation of the apparatus shown in Fig. 1. Fig. 3 is a detail of a part of the mechanism shown in 5 Fig. 1 with a detector in abnormal position, and Fig. 3 is a detail in plan of a portion of the feeler.

While I have herein illustrated my invention as applied to a loom as its most general application, my invention is not restricted to such use.

Of the loom mechanism shown in Fig. 1 the frame A, harnesses H, shipper-handle S, and whip roll or bar W may be of any usual or well-known construction, and I have herein shown my stop-motion apparatus arranged to also effect the leasing of the warp-threads, so that I dispense entirely with the usual lease-rods.

Stands M are mounted on the loom sides to support two parallel fixed rods or bars m n, extended across the loom between the harnesses and the whip-roll and in a substantially horizontal plane below a warp rest 7", also mounted in the stands M.

I have herein shown two rows or banks of stop-motion-controlling detectors d, loosely mounted to swing or move angularly on the supports an and n, one series of detectors on each, and normally inclined in opposite directions. Each detectord is preferably made of a thin fiat strip of sheet metal, much longer than it is wide, and provided with two holes or apertures d symmetrically located with respect to the ends of the detector, the distance between an aperture and the adjacent end of the detector being greater.than the distance between the fixed support and the Warp-threads.

The supporting-rod m is extended through one aperture d of each detector of its series and a warp-thread through the other aper ture of each, and in like manner the support 11 has pivotally mounted upon it a series of detectors, the division or leasing of the warpthreads being readily effected by having the two series or banks of detectors. As shown herein, the series on the support we are inclined toward the back of the loom and the otherseries on the support n are inclined toward the front, the inner ends of the detectors being free when released by broken or unduly-slack warp-threads to swing up past the warp-rest 1', over which the warps pass.

Warp-threads in normal condition maintain the detectors, as shown in full lines, Fig.

1, so that they are out of the path of movement of two feelers o w, shown as angle-irons secured to oppositely-extended arms 7) to, fast on parallel rock-shafts o w mounted. too in bearings on the stands M, belowa flat plate or bar M which forms a back-stop for a released detector when engaged by a feeler, the rock-shafts being connected to move in opposite directions by segment-gears r 20 When a detector is released,itslonger portion above the support swings down, bringing the detector into upright position, with the extension beyond the axial support projecting above the warp-threads, as shown by dotted lines, Fig. l, and full lines, Fig. 3, to not only indicate to the weaver the presence of a faulty thread, but also its location, so that it can be readily found, rethreaded through its detector, and pieced up. The feeler on its inward stroke engages the edge of the depending detector opposite the backstop M which latter prevents swinging of the detector, and the feeler is arrested.

I prefer to notch the acting edge of the feeler, as shown in Fig. 3 at 20, to thereby keep the engaged detector from bending or twisting sidewise. P

The feelers are normally vibrated by any suitable mechanism, through which the stopping means is operated upon arrest of the feeler by adetector in abnormal position, and the mechanism herein shown is substantially such as illustrated in United States Patent No. 622,182, dated March 29, 1899, and which will be described briefly.

An arm a on one of the rock-shafts, as ZUX, and extended oppositely to the feeler 10 has pivotally connected to it a bent arm a provided with a hunter a and a toe a, cooperating with an edge cam D, preferably on the cam-shaft C, said hunter a being thus moved into and outof the path of one or more tappetsfof a cam F, fast on the shaft 0.

When either feeler is arrested by a released detector, the hunter a will be held up in the path of the tappets, engagement therewith swinging the arm (6 to the rear. Said arm is slotted at a to receive a stud d on a short lever d pivoted at its upper end at d to a link (1 hooked around the cam-shaft at d and jointed at its other end to an arm 6 of a rockshaft e provided with a knock-off arm 6 for the shipper-lever. The lower end of the lever al and the arm a are connected by a rod e the joint 8 connecting said rod and lever. The bunter a is acted upon by the tappet-cam F, the swing of the upper end of said lever moving the link d longitudinally to operate the knock-off arm and release the shipper-handle S, the position of the hunter relative to the tappets being regulated by the check-nuts at the lower end of the rod 2 as in the patent referred to.

The feelers are moved toward the detectors by the weight of the arm a and its connected parts, the reverse or outward movements of the feelers being effected by the cam D.

The lower end of the rod 9 is pivotally connected with the arm 6, as in the patent referred to, and it will be manifest that the normal up-and-down movement of the lever (Z due to the cam D and cooperating bent arm a will cause bodily movement of the link (i and rod 6 about their commonpoint of connection with the arm 6. It will also be manifest that the lever (Z must be connected with said arm 0 below, as well as above, the hunter a which latter is connected with the lever (Z by the stud d, for if the lever be not so connected the engagement of the bunter with a tappet would merely result in swinging the lever rearwardly about 61 without rocking the shaft e at all.

I have herein shown an operative mechanism embodying one form of my invention, without attemptingto show the various modifications in which my invention may be embodied without departing from its spirit and scope.

Having described the invention, what is claimed is- 1. In an apparatus of the class described, a series of thin, fiat detectors each having two apertures nearand symmetrically located relative to its ends, a fixed support loosely extended through one aperture of each detector, one of the warp threads passing through the other aperture and normally maintaining the. detector in an upwardly-inclined position, a feeler, stopping means operative by or through engagement of the feeler with a detector released by its Warpthread and depending from the support, and a fixed rest to prevent pivotal movement of a detector when engaged by the feeler.

2. In an apparatus of the class described, a series of thin, fiat detectors each having two apertures therein and extended for an equal distance beyond each aperture, a fixed support extended loosely through either aperture of a detector, and located below the warp-threads, one of the warp-threads passing through the other aperture of each detector and normally maintaining the adjacent end of the detector above the plane of the warps, a released detector swinging on its support to bring the end adjacent thereto above the warp-threads, a feeler to engage the depending portion of a released detector, a stop to prevent movement of the detector when so engaged, and stopping means operative by or through the feeler when engaged by a released detector.

3. In an apparatus of the class described, a series of flat, elongated reversible detectors each having a hole near each end, a fixed support extended through one of the holes of each detector and located below the plane of the warp threads, the threads passing through the other holes of the detectors and normally maintaining them in inoperative position, a feeler to engage the detector re= leased by breakage of its thread, the detector at such time turning on its support to bring the end adjacent the latter into indicating position above the plane of the threads, and stopping means for the apparatus, operative by or through engagement of the feeler with a detector in abnormal position.

4. In an apparatus of the class described,

a series of flat, elongated reversible detectors each having two apertures therein, the ends of the detector forming extensions beyond the apertures, a fixed support extended through one aperture of a detector and a warp-thread passed through the other, a feeler to engage a detector released by its warp-thread and moved by gravity into depending position on its support, and stopping means for the apparatus, operative by or through arrest of the feeler by a released detector.

5. In a warp stop-motion for looms, two series of pivotally-mounted and oppositely-movable detectors controlled and maintained inoperative by normal warp-threads, a support for each series of detectors, located between the points at which the warp-threads are engaged by the detectors in the two series, a common back-stoplocated below the supports, to stop a detector released by its warp-thread and depending from its support, a feeler to cooperate with a released detector in each series, and stopping means operative by or through the feeler when in engagement with a released detector.

6. In a warp stop-motion for looms, two series of pivotally-mounted and oppositely-movable detectors controlled and maintained inoperative by normal warp-threads, a support for each series of detectors, located between the points at which the warp-threads are engaged by the detectors in the two series, a common back-stop located below the supports, to stop a detector released by its warp-thread and depending from its support, a warp-rest located above said supports and between the oppositely-extended upper ends of the detectors of the two series when in normal position,

motion-controlling detectors pivotally mounted on each support, and held in oppositelyextended positions by normal warp-threads, a pair of rock-shafts mounted in the stands, a feeler connected with each, and stopping means for the apparatus, to efiect the normal vibration of the feelers and operative by or through arrest of a feeler bya released detector to stop the apparatus.

8. In a loom, shedding mechanism, two series of oppositely-inclined, pivotally-mounted stop-motion-controllin g detectors mounted behind the shedding mechanism, maintained in inoperative position by normal warp-threads and leasing the latter, a feeler to cooperate with each series and to engage a released detector, a fixed support for and upon which the detectors of each series are mounted to rock, stopping means for the loom, operative by or through engagement of a feeler with a released detector,and common means to prevent swing ing movement of the detector when so en= gaged.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witneses.

GEORGE O. DRAPER.

Witnesses:

' SIMON W. HATHEWAY, JOHN G. EDWARDS. 

